Smoke Simulation - Bake Offset before Frame 0
I am answering myself, it is a workaround 


set frame Start: -125 frame End: 125
click "Bake" the sim should bake, but not move in preview
"Free Bake" and go to frame 0
Let the smoke simulate in viewport from frame 0(do not click Bake)
Click "Current cache to bake"


Voilá